Definition
When the police, army, or any authoritative group initiates action or is directed to do so, they assert control or engage to address a challenging or perilous circumstance.
接管；（對…）進行控制或介入
The police moved in quickly at the protest site to prevent the situation from escalating.
警方迅速在抗議現場介入，以防止局勢升級。
The government troops moved in to restore order in the war zone.
政府軍隊介入戰區以恢復秩序。
When the violence escalated in the neighborhood, the city police department decided to move in.
當社區的暴力事件升級時，市警察局決定介入。